Need for predictable random generator

Question

I\'m a web-game developer and I got a problem with random numbers. Let\'s say that a player has 20% chance to get a critical hit with his sword. That means, 1 out of 5 hits

Answer 1

You could create a list containing the numbers from 1 to 5, and have them sorted by randomness. Then just go through the list you created. You have a guarantee of running into every number at least once... When you're through with the first 5, just create another 5 numbers...